Hitachi HTS541680J9AT00 Specifications - Page 64

Diagnostic and Reset considerations - password

Get Hitachi HTS541680J9AT00 - Travelstar 80 GB Hard Drive PDF manuals and user guides
UPC - 683728200794
View all Hitachi HTS541680J9AT00 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 64 highlights

12.2 Travelstar 5K160 (PATA) Hard Disk Drive Specification Diagnostic and Reset considerations The Set Max password, the Set Max security mode and the Set Max unlock counter don't retain over a Power On Reset but persist over a Hard Reset or Soft Reset. For each Reset and Execute Device Diagnostic, the Diagnostic is done as follows: Power On Reset, Hard Reset DASP- is read by Device 0 to determine if Device 1 is present. If Device 1 is present Device 0 shall read PDIAG- to determine when it is valid to clear the BSY bit and whether Device 1 has powered on or reset without error, otherwise Device 0 clears the BSY bit whenever it is ready to accept commands. Device 0 may assert DASP- to indicate device activity. If Device 1 is not present, Device 0 does not Assert DASP- at POR. Soft Reset If Device 1 is present Device 0 shall read PDIAG- to determine when it is valid to clear the BSY bit and whether Device 1 has reset without any errors, otherwise Device 0 shall simply reset and clear the BSY bit. DASP- is asserted by Device 0 (and Device 1 if it is present) in order to indicate device active. Execute Device Diagnostic If Device 1 is present, Device 0 shall read PDIAG- to determine when it is valid to clear the BSY bit and if Device 1 passed or failed the EXECUTE DEVICE DIAGNOSTIC command, otherwise Device 0 shall simply execute its diagnostics and then clear the BSY bit. DASP- is asserted by Device 0 (and Device 1 if it is present) in order to indicate the device is active. In all the above cases: Power on, RESET-, Soft reset, and the EXECUTE DEVICE DIAGNOSTIC command the Device 0 Error register is shown in the following table. Device 1 Present? PDIAG- Asserted? Device 0 Passed Error Register Yes Yes Yes 01h Yes Yes No 0xh Yes No Yes 81h Yes No No 8xh No (not read) Yes 01h No (not read) No 0xh Where x indicates the appropriate Diagnostic Code for the Power on, RESET-, Soft reset, or Device Diagnostic error. Figure 26 Reset error register values 64/188

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
Travelstar 5K160 (PATA) Hard Disk Drive Specification
64
/
188
12.2
Diagnostic and Reset considerations
The Set Max password, the Set Max security mode and the Set Max unlock counter don't retain over a Power On
Reset but persist over a Hard Reset or Soft Reset.
For each Reset and Execute Device Diagnostic, the Diagnostic is done as follows:
Power On Reset, Hard Reset
DASP- is read by Device 0 to determine if Device 1 is present. If Device 1 is present Device 0 shall read PDIAG- to
determine when it is valid to clear the BSY bit and whether Device 1 has powered on or reset without error,
otherwise Device 0 clears the BSY bit whenever it is ready to accept commands. Device 0 may assert DASP- to
indicate device activity. If Device 1 is not present, Device 0 does not Assert DASP- at POR.
Soft Reset
If Device 1 is present Device 0 shall read PDIAG- to determine when it is valid to clear the BSY bit and whether
Device 1 has reset without any errors, otherwise Device 0 shall simply reset and clear the BSY bit. DASP- is
asserted by Device 0 (and Device 1 if it is present) in order to indicate device active.
Execute Device Diagnostic
If Device 1 is present, Device 0 shall read PDIAG- to determine when it is valid to clear the BSY bit and if Device 1
passed or failed the EXECUTE DEVICE DIAGNOSTIC command, otherwise Device 0 shall simply execute its
diagnostics and then clear the BSY bit. DASP- is asserted by Device 0 (and Device 1 if it is present) in order to
indicate the device is active.
In all the above cases: Power on, RESET-, Soft reset, and the EXECUTE DEVICE DIAGNOSTIC command the
Device 0 Error register is shown in the following table.
Device 1 Present?
PDIAG- Asserted?
Device 0 Passed
Error Register
Yes
Yes
Yes
01h
Yes
Yes
No
0xh
Yes
No
Yes
81h
Yes
No
No
8xh
No
(not read)
Yes
01h
No
(not read)
No
0xh
Where x indicates the appropriate Diagnostic Code for the Power on, RESET-, Soft reset, or Device Diagnostic
error.
Figure 26 Reset error register values